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@crazyrokr crazyrokr commented Nov 19, 2025

Initial implementation of retain message feature

3 MQTT Control Packets
3.3 PUBLISH – Publish message
    └ 3.3.1 PUBLISH Fixed Header
        └ 3.3.1.3 RETAIN

  1. If a client publishes a message with RETAIN flag, then the message is retained within the corresponding topic name
  2. If a client subscribes to a topic filter, then all retained messages within topic names matching the topic filter are automatically released to the client
  3. If during the releasing of retained messages a target subscription has retainAsPublished=0 then RETAIN flag is set to 0 in the forwarder publish message

# Conflicts:
#	model/src/main/java/javasabr/mqtt/model/subscriber/tree/ConcurrentRetainedMessageTree.java
#	model/src/main/java/javasabr/mqtt/model/subscriber/tree/ConcurrentSubscriberTree.java
#	model/src/main/java/javasabr/mqtt/model/subscriber/tree/RetainedMessageNode.java
#	model/src/main/java/javasabr/mqtt/model/subscriber/tree/SubscriberNode.java
#	model/src/main/java/javasabr/mqtt/model/subscriber/tree/SubscriberTreeBase.java
#	model/src/main/java/javasabr/mqtt/model/subscribtion/tree/ConcurrentSubscriptionTree.java
#	model/src/main/java/javasabr/mqtt/model/subscribtion/tree/TopicFilterNode.java
#	model/src/main/java/javasabr/mqtt/model/subscribtion/tree/TopicFilterTreeBase.java
#	model/src/main/java/javasabr/mqtt/model/topic/tree/ConcurrentTopicTree.java
#	model/src/main/java/javasabr/mqtt/model/topic/tree/TopicNode.java
#	model/src/main/java/javasabr/mqtt/model/topic/tree/TopicTreeBase.java
#	model/src/test/groovy/javasabr/mqtt/model/topic/tree/SubscriberTreeTest.groovy
#	service/src/main/java/javasabr/mqtt/service/impl/InMemorySubscriptionService.java
crazyrokr and others added 5 commits November 20, 2025 08:15
# Conflicts:
#	application/src/main/java/javasabr/mqtt/broker/application/config/MqttBrokerSpringConfig.java
#	core-service/src/main/java/javasabr/mqtt/service/impl/InMemorySubscriptionService.java
#	core-service/src/test/groovy/javasabr/mqtt/service/message/handler/impl/SubscribeMqttInMessageHandlerTest.groovy
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github-actions bot commented Dec 1, 2025

@crazyrokr crazyrokr linked an issue Dec 5, 2025 that may be closed by this pull request
# Conflicts:
#	core-service/src/main/java/javasabr/mqtt/service/SubscriptionService.java
#	core-service/src/main/java/javasabr/mqtt/service/impl/InMemorySubscriptionService.java
#	core-service/src/main/java/javasabr/mqtt/service/publish/handler/impl/AbstractMqttPublishOutMessageHandler.java
#	core-service/src/main/java/javasabr/mqtt/service/publish/handler/impl/PersistedMqttPublishOutMessageHandler.java
#	core-service/src/main/java/javasabr/mqtt/service/publish/handler/impl/Qos0MqttPublishOutMessageHandler.java
#	core-service/src/main/java/javasabr/mqtt/service/publish/handler/impl/Qos1MqttPublishOutMessageHandler.java
#	core-service/src/main/java/javasabr/mqtt/service/publish/handler/impl/Qos2MqttPublishOutMessageHandler.java
@crazyrokr crazyrokr marked this pull request as ready for review December 7, 2025 14:18
@crazyrokr crazyrokr requested a review from JavaSaBr December 7, 2025 16:04
@crazyrokr crazyrokr added enhancement New feature or request core labels Dec 7, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
Repository owner deleted a comment from github-actions bot Dec 9, 2025
@crazyrokr crazyrokr requested a review from JavaSaBr December 9, 2025 14:36
# Conflicts:
#	application/src/main/java/javasabr/mqtt/broker/application/config/MqttBrokerSpringConfig.java
#	core-service/src/test/groovy/javasabr/mqtt/service/IntegrationServiceSpecification.groovy
@Nullable
public SingleSubscriber subscribe(MqttUser user, Subscription subscription) {
return rootNode.subscribe(0, user, subscription, subscription.topicFilter());
public SingleSubscriber subscribe(SingleSubscriber subscriber) {
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you break the abstraction

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@crazyrokr crazyrokr Dec 10, 2025

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I believe SingleSubscriber has to be created by SubscriptionService, not by SubscriberTree

@crazyrokr crazyrokr requested a review from JavaSaBr December 13, 2025 09:18
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Implement Retained Messages

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